Portion of a wiper



FIG. 1 is a front right perspective view of a portion of a wiper showingour new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines immediately adjacent to the shaded areas representunclaimed boundaries of the claimed design. The remaining broken linesare for illustrative purposes only and form no part of the claimeddesign.

The ornamental design for a portion of a wiper, as shown and described.